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Enclosures

Tuning Knobs

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NOTE: PCB dimensions are intended as an aid to orientation for selecting the enclosure. Cutouts of pillars are not taken into consideration. For detailed information please refer to the drawing or ask for a sample.DIN Modular Cases, Potting Boxes and Railtec type C enclosures are not included in the PCB search.

Modern plastic enclosures, aluminium enclosures and tuning knobs for many different applications: Handheld enclosures, wall-mount enclosures, table top enclosures, DIN rail enclosures etc. Take a look for yourself!

EMC shielding

Safe and reliable thanks to application-oriented EMC

When it is a question of EMC and the protection of your electronics from external interference as well as increased internal emission noise, OKW Gehäusesysteme is your competent partner.

EMC Aluminium coating

Thanks to the investment in our own vapour-plating facility, we can offer you "Everything from one supplier". To shield plastic parts, which offer no natural protection against electromagnetic radiation, we coat the inside of the enclosure with aluminium. Our extensive in-house facility guarantees short production and delivery times.

Aluminium coating

The aluminium coating is applied in a high vacuum. The 99.99 % pure aluminium is vaporised within a short period of time and is deposited on the plastic surface. The thickness of the coating is approx. 2.5 µm. The aluminium coating is also characterised by good adhesion. To achieve an even better shielding effect, other coating thicknesses are available on request.

Certification in accordance with UL 746C / ALVACOAT®*

We have certification in accordance with UL 746C for the following materials in the standard OKW colours:

Cycolac S157

Rotec ABS 1001 FR/E

Rotec ABS 3001

Terluran GP-22

Novodur P2H-AT

Lexan 141R(f2)

Durethan BKV15H2.0+

Luran KR2867 CWU

Romiloy ASA/PC 8170

For current information, please refer to www.ul.com online certifications directory under UL File Number E257055. To download a certificate, see menu Information > Download.

*ALVACOAT® is a registered trademark of OKW Gehäusesysteme GmbH and identifies the process used by OKW to coat plastic parts made of standard materials that are certified in accordance with UL 746C.

NoteEMC and plastic enclosures

The non-conducting material used for plastic enclosures, for example ABS, PC and PA, has advantages in voltage and contact protection compared with metal materials. It behaves like an insulator.

For devices that causes electromagnetic interference or whose operation is impaired by such interference, plastic enclosures without special measures offer only moderate protection.

To meet current EC directives and standards, a variety of measures is required. For reasons of cost-effectiveness we recommend the following procedure:

The complete electric/electronic equipment, including board layout, should be designed in such a way that EMC requirements are met. This also includes a reduction in conducted interference and the elimination of cable interference radiation.

Partial screening of the sensitive components or interference radiators.

Reduction of interfering radiation entering through openings.

Increase in the screening effect of the case.

Additional EMC measurements

As almost every case is provided with openings and cable connections which reduce the shielding effect, it is important to observe the following recommendations:

Cable glandsIn order to maintain the protection class of the enclosure and to reduce cable radiation, suitable cable glands are necessary.

Please keep in mind that the use of external accessories may influence the protection class, for example, and can cause corrosion. For this reason, we recommend consulting the supplier prior to using these external accessories.